A caniuse.com integration right inside your slack channel. Ask hubot about browser support!
npm install --save hubot-caniuse
add ["hubot-caniuse"] to your external-scripts.json.
hubot caniuse borde-radius ->
CSS3 Border-radius (rounded corners)* (http://caniuse.com/#feat=border-radius):
`ie:9+, firefox:3+, chrome:4+, safari:3.1+, opera:10.5+, ios_saf:3.2+, op_mini:-, android:2.1+, bb:7+, op_mob:11+, and_chr:40+, and_ff:33+, ie_mob:10+, and_uc:9.9+